Re: FB pohpe

Hello,

You can use:
  <p>
    <a href="http://validator.w3.org/check?uri=referer"><img
      src="http://www.w3.org/Icons/valid-xhtml10" alt="Valid XHTML 1.0 Transitional" height="31" width="88" /></a>
  </p>
This code gets displayed on the validator.w3.org result page once your site validates. It shows a "valid" icon and provides a link to check that your page is actually valid.

Note however that only web designers are usually interested at whether a site validates or not. You know your users better than I, but I suggest you consider the question before adding this icon.

Regards,

-- 
Etienne Miret